Tigrayan rebels have set up a team to negotiate with the Ethiopian government, a spokesman for the Tigray People’s Liberation Front told AFP on Monday, 20 months after war broke out in the northern region. The announcement comes less than a week after an Ethiopian government body tasked with examining the possibility of peace talks with the TPLF held its first meeting. But in a sign of the challenges dogging the process, Prime Minister Abiy Ahmed’s Prosperity Party insisted any negotiations could only be led by theAfrican Union (AU), a stance rejected by the rebels. The TPLF has voiced concern…